Monochromatic lights **A** and **B** are entered at points **p** and **q**, respectively, on the cross section of a semi-cylinder glass, as shown above left. Point **O** is the center of the cross section of the semi-cylinder glass. As shown above right, the paths of **A** and **B** are parallel, and they meet the curved surface of the semi-cylinder glass with angles \(\theta_A\) and \(\theta_B\), respectively, which are the critical angles of the two monochromatic lights. Which of the following statements is correct?

The refractive index of the air is \(1\).

a) The wavelength of light **A** in the glass is longer than that of light **B** in the glass.

b) If the monochromatic light **A** enters at point **q** instead of **p**, then it will totally be reflected internally.

c) If a light with a shorter wavelength than the monochromatic light **A** is entered at point **p**, then it will totally be reflected internally.

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